Unlock instant, AI-driven research and patent intelligence for your innovation.
Prepn of low temperature early strength coagulant for magnesia cement
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of magnesia cement and coagulation accelerator, which is applied in the field of preparation of magnesia cement low-temperature early-strength coagulation accelerator, which can solve the problems of low early strength, long demoulding time, and slow reaction speed, so as to improve strength and shorten coagulation the effect of time
Inactive Publication Date: 2007-02-07
SHANDONG PROVINCIAL ACAD OF BUILDING RES
View PDF1 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Even so, since this material can only react normally at a temperature of 20°C-35°C, the reaction activation energy at low temperature (0°C-10°C) is low, the reaction speed is slow, the early strength is low, and the demoulding time is long. Therefore, when using this material to manufacture products under low temperature conditions, product quality and production efficiency are reduced, and energy consumption is increased.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] The percentage by weight of each raw material in the total weight is: 35% of water, 30% of NaOH solution with a concentration of 30%, 15% of β-chloropropionic acid, and 20% of -ethanolamine.
[0018] Add water, 30% NaOH solution, and β-chloropropionic acid to the reaction kettle according to the percentage, stir evenly, and react at 50°C for 60 minutes, then slowly add the measured -ethanolamine, and heat to 85 °C, and stirred at this temperature for 120 minutes.
Embodiment 2
[0020] The percentage by weight of each raw material in the total weight is: 45% of water, 30% of NaOH solution with a concentration of 30%, 15% of β-chloropropionic acid, and 10% of -ethanolamine.
[0021] Measure water, 30% NaOH solution, and β-chloropropionic acid into the reaction kettle according to the above ratio, stir evenly, react at 55°C for 75 minutes, then slowly add the measured ethanolamine, and heat to 95°C, and kept stirring at this temperature for 115 minutes.
Embodiment 3
[0023] The percentage by weight of each raw material in the total weight is: 40% of water, 25% of NaOH solution with a concentration of 30%, 20% of β-chloropropionic acid, and 15% of -ethanolamine.
[0024] Measure water, 30% NaOH solution, and β-chloropropionic acid into the reaction kettle according to the above ratio, stir evenly, react at 60°C for 90 minutes, then slowly add the measured ethanolamine, and heat to 90°C, and kept stirring at this temperature for 90 minutes.
[0025] Among the above-mentioned embodiments, embodiment 3 is the best embodiment.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The low temperature early strength coagulant for magnesia cement is prepared with water 35-45 wt%, concentration 30 % NaOH solution 20-30 wt%, beta-chloropropionic acid 12-25 wt%, and monoethanolamine 10-20 wt%. It is prepared through mixing the first mentioned three kinds of material in reactor via stirring, reaction at 50-60 deg.c for 60-90 min, adding monoethanolamine slowly, heating to 85-95 deg.c, stirring while maintaining the temperature for 90-120 min, cooling to room temperature and canning. The present invention is added into magnesia cement slurry and has the features of shortening the coagulation time at low temperature, raising the early strength of the product, shortening demolding time, raising production efficiency and lowering production cost.
Description
technical field [0001] The invention relates to a preparation method of a low-temperature early-strength coagulant for magnesia cement. Background technique [0002] Magnesia cement, also known as magnesia cementitious material, is an air-hardening cementitious material. When using this material to manufacture products, it does not require moisture curing; at 20°C-35°C, especially when it is above 25°C , fast strength growth, high flexural and compressive strength; weak alkalinity, low corrosion, high elasticity, good toughness, light weight; good cementation to organic and inorganic materials or fibers, etc., widely used in In the fields of construction, decoration, urban construction, agriculture, etc., it is used to make inorganic glass fiber reinforced plastic ventilation pipes, non-combustible glass magnesium plates, urban road inspection manhole covers, lightweight partition panels and anti-static panels and other products. Even so, since this material can only react ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More